Contractual Dispute Over Unilateral Promise to Sell Lacking Fixed Price

The case involved a contractual dispute concerning the obligations arising from a written promise to sell, where the seller later refused to proceed with the final sale, leading the intended buyer to seek judicial enforcement of the agreement. The Court of Cassation upheld the lower court's decision, reasoning that in contracts such as a unilateral promise to sell, the stipulated purchase price must be clearly and unequivocally determined or determinable according to the contract terms at the time of the promise; where the agreement lacked a fixed or readily ascertainable price, it constituted an agreement on the object but not the essential condition of the sale, rendering the promise unenforceable for specific performance.